Driver IC and display device

摘要

The driver IC includes: a control circuit operable to perform control for creating the timing of detection by a touch panel in a non-display drive period during which the action of a drive circuit remains stopped, and for creating a display drive period during which the drive circuit drives the display panel, and the non-display drive period; and a data RAM operable to hold display data of more than one display line, but smaller than one display frame in capacity. The control circuit performs control for alternately creating the display and non-display drive periods by repeating a memory-addressing operation for writing display data supplied from outside into the RAM and reading the display data from the RAM at a speed faster than the writing speed to provide the read data to the drive circuit two or more times in a period of one display frame according to a wraparound method.

主权项

1. A driver IC which controls an activation of a display panel and a detection timing of a touch panel comprising:
a drive circuit operable to activate the display panel in a display drive period; a control circuit operable to create the detection timing of the touch panel in a non-display drive period during which the action of the drive circuit remains stopped, and to create the display drive period and the non-display drive period; and a data Random Access Memory (a data RAM) operable to hold display data of more than one display line, but smaller than one display frame in capacity, wherein the control circuit performs the control for alternately creating the display drive period and the non-display drive period by repeating a memory-addressing operation for writing display data supplied from outside into the data RAM and reading the display data from the data RAM at a speed faster than the writing speed to provide the read data to the drive circuit two or more times in a period of one display frame according to a wraparound method, wherein the control circuit has a register circuit for rewritably holding touch interval period data for controlling an addressing range of the memory-addressing operation to be repeated according to the wraparound method within a range of a number of display lines comparable to up to a maximum memory capacity of the data RAM, and wherein the touch interval period data is control data which controls a number of the display lines grouped that is counted so as to make an adjustable space between non-display drive periods based on the number of display lines grouped.